EntityQ625519· pop 19· linked from 154 articlesquadratic fieldSign in to savealgebraic number field of degree two over the rational numbersConnectionsramificationEntityInternational Standard Book NumberEntityreal numberEntityrational numberEntityGalois theoryEntitydiscriminantEntityalgebraic number theoryEntityMathWorldEntityfinite fieldEntityalgebraic number fieldEntitySpringer Science+Business MediaEntityGaussian integerEntitynilpotent elementEntitysquare-free integerEntityfield extensionEntityEric W. WeissteinEntityquadratic reciprocityEntityIan StewartEntityEuclidean domainEntityEncyclopedia of MathematicsEntityCategoriesAlgebraic number theoryField theory